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Side effects appear to be infrequent and mild in most reported cases, and may include: Temporary injection site reactions (with subcutaneous administration) Mild headache in some individuals Vivid dreams often considered a sign of enhanced REM sleep activity Occasional mild gastrointestinal discomfort DSIP does not appear to suppress respiratory function or cause the cognitive impairment sometimes associated with sedative-hypnotic drugs

Jan 28 2020;9(2)doi:10.3390/antiox9020116 Guo J, Hao X, Wang R, et al

Cell culture and measurement of cellular NAD + CHO cells stably transfected with a mouse CD38 plasmid (CHO-mCD38) were cultured in DMEM medium supplemented with 10% FBS (Thermo Fisher Scientific), 2 mM L-glutamine, 120 U ml 1 penicillin and streptomycin (Lonza, Alpharetta, GA), and 400 nM nicotinamide mononucleotide (NMN))

This transmethylation reaction also involves folate (vitamin B 9 ) and is therefore critical for nucleic acid synthesis